Frost heaving means frozen water in soil. If frozen water doesn't thaw at all, it is permafrost.
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Frost heaving on the spot of brown earth without cover of plants. The effect of frost heaving is reduced on the area covered by grass.
Ice lens formation resulting in frost heave in cold climates.
Partially melted and collapsed lithalsas (heaved mounds found in permafrost) have left ring-like structures on the Svalbard Archipelago
Palsas (heaving of organics-rich soils in discontinuous permafrost) may be found in alpine areas below Mugi Hill on Mount Kenya.